Problem to be solved: to provide an automatic water research apparatus capable of stably performing the work of removing the polishing paper from the cushion pad in the replacement work of the polishing paper.The inclination angle of the end face 41g of the clamp pawl 41b is applied to an automatic water research apparatus equipped with a paper peeling unit 41 having a clamp shaft 41a and a clamp claw 41b. The inclination of the outer circumferential surface 55A of the cushion pad 55 at the start point of the paper peeling step is made to coincide.ThusThe front end face 41g of the clamp clawAt the same time as it comes into contact with the outer peripheral surface 55A of the cushion pad 55, it abuts against the outer peripheral edge of the diskThe pinching of the cushion pad due to deformation of the outer peripheral surface 55A of the cushion pad 55 and its peripheral portion is suppressed.Removal of the polishing paper 56 from the cushion pad 55 can be carried out well, and the removal of the polishing paper 56 can be stably performed.Diagram
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